Finding the Fourth Proportional to 191.70, 287.55 and 69.99
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Solution
The fourth proportional to 191.70, 287.55 and 69.99 is: 104.99
Step by Step Solution
- Step 1: Write the proportion equation
191.70 : 287.55 = 69.99 : x - Step 2: Convert to fraction form
191.70/287.55 = 69.99/x - Step 3: Cross multiply
191.70x = 287.55 × 69.99 - Step 4: Simplify right side
191.70x = 20,125.62 - Step 5: Solve for x
x = 20,125.62/191.70 - Step 6: Final answer
x = 104.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.